SmartmanApps

Expand

As in "expand and simplify". If you only expanded then you haven't simplified yet.

because each coefficient

There's only 1 coefficient - in this case it's (a-x) - the rest are just factors.

they’re not constants

They could be - we haven't been given that information.

33,554,432 terms

Actually it would be that many factors. The whole thing is a single Term.

is already simplified (fully factored)

No it isn't, given one of the factors is equal to zero. That's like saying 2/4 is fully simplified when clearly it isn't. Students lose marks in tests for not simplifying their answers. Writing 2/4 as an answer would only get half-marks. Similarly, the only full-marks answer to this question is 0.

The rest of useful information is pretty much not available without premium account anyway

That's not true. There's was more info there than your 2 sentences. e.g. syncing to other devices.

Of course I read it. Why would you think I didn't? There was more info there than your "2 sentences".

I looked again, since the text I could see there was different to what I saw on the site, and that is actually at the BOTTOM of the page - there's a whole bunch of the article above that - so for some reason your phone(?) is taking you to the bottom of the page (I'm on desktop and it opens up at the top of the page).

Paywall? I had no trouble getting it to display.

Issue is now closed - "The fix is included in 9.0 GA. This did not make it in time for RC2"

Just to be clear, it's not MY book, but the book of whoever's blog that is (Michael someone) - that's the title of the blog post "My book...".

Ah ok. I saw there was issues with federation and communities getting blocked, didn't think either of those would be it. Thanks for letting me know!

Yes, provided you meet the criteria, so I'm guessing maybe he doesn't... or maybe he just wants to make the point that MS are earning income from this and yet not providing any more support than a free product is providing.